01-31 14:52 H.B. 387
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Firearm Attachment Amendments
2025 GENERAL SESSION
STATE OF UTAH
Chief Sponsor: Andrew Stoddard
Senate Sponsor:
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LONG TITLE
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General Description:
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This bill addresses firearm attachments.
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Highlighted Provisions:
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This bill:
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▸ creates the criminal offenses of unlawful possession, manufacture, distribution, or sale of
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a machinegun firearm attachment; and
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▸ makes technical and conforming changes.
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Money Appropriated in this Bill:
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None
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Other Special Clauses:
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None
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Utah Code Sections Affected:
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AMENDS:
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76-10-509.4, as last amended by Laws of Utah 2024, Chapter 301
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ENACTS:
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76-10-533, Utah Code Annotated 1953
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Be it enacted by the Legislature of the state of Utah:
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Section 1. Section 76-10-509.4 is amended to read:
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76-10-509.4 . Possession of a dangerous weapon by a minor -- Penalties.
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(1) As used in this section, "responsible adult" means an individual:
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(a) who is 18 years old or older; and
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(b) who may lawfully possess a dangerous weapon.
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(2) An actor who is under 18 years old may not possess a dangerous weapon.
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(3)(a) Except as provided in Subsection (3)(b), a violation of Subsection (2) is:
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(i) a class B misdemeanor for a first offense; and
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(ii) a class A misdemeanor for each subsequent offense.
H.B. 387 H.B. 387 01-31 14:52
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(b) A violation of Subsection (2) is a third degree felony if the dangerous weapon is:
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(i) a handgun;
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(ii) a short barreled rifle;
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(iii) a short barreled shotgun; or
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(iv) a fully automatic weapon[; or] .
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[(v) a machinegun firearm attachment.]
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(4) For an actor who is younger than 14 years old, this section does not apply if the actor:
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(a) possesses a dangerous weapon;
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(b) has permission from the actor's parent or guardian to possess the dangerous weapon;
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(c) is accompanied by the actor's parent or guardian, or a responsible adult, while the
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actor has the dangerous weapon in the actor's possession; and
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(d) does not use the dangerous weapon in the commission of a crime.
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(5) For an actor who is 14 years old or older but younger than 18 years old, this section
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does not apply if the actor:
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(a) possesses a dangerous weapon;
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(b) has permission from the actor's parent or guardian to possess the dangerous weapon;
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and
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(c) does not use the dangerous weapon in the commission of a crime.
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Section 2. Section 76-10-533 is enacted to read:
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76-10-533 . Unlawful possession, manufacture, distribution, or sale of a
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machinegun firearm attachment.
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(1) The terms defined in Sections 76-1-101.5 and 76-10-501 apply to this section.
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(2) An actor commits unlawful possession, manufacture, distribution, or sale of a
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machinegun firearm attachment if the actor intentionally or knowingly:
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(a) possesses a machinegun firearm attachment;
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(b) manufactures a machinegun firearm attachment;
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(c) distributes a machinegun firearm attachment; or
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(d) sells a machinegun firearm attachment.
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(3)(a) A violation of Subsection (2) is a class B misdemeanor if the actor is 18 years old
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or older.
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(b) A violation of Subsection (2) is a third degree felony if the actor is younger than 18
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years old.
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Section 3. Effective Date.
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This bill takes effect on May 7, 2025.
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